diff --git a/dvadmin-backend/apps/vadmin/op_drf/filters.py b/dvadmin-backend/apps/vadmin/op_drf/filters.py
index b250cd3..62b1b9b 100644
--- a/dvadmin-backend/apps/vadmin/op_drf/filters.py
+++ b/dvadmin-backend/apps/vadmin/op_drf/filters.py
@@ -6,7 +6,7 @@ import logging
 import operator
 from functools import reduce
 
-from django.utils import six
+# from django.utils import six
 from mongoengine.queryset import visitor
 from rest_framework.filters import BaseFilterBackend, SearchFilter, OrderingFilter
 
@@ -34,7 +34,7 @@ class MongoSearchFilter(SearchFilter):
         if not search_fields or not search_terms:
             return queryset
         orm_lookups = [
-            self.construct_search(six.text_type(search_field))
+            self.construct_search(str(search_field))
             for search_field in search_fields
         ]
         if not orm_lookups:
@@ -67,7 +67,7 @@ class MongoOrderingFilter(OrderingFilter):
             ]
         else:
             valid_fields = [
-                (item, item) if isinstance(item, six.string_types) else item
+                (item, item) if isinstance(item, str) else item
                 for item in valid_fields
             ]
 
diff --git a/dvadmin-backend/apps/vadmin/utils/authentication.py b/dvadmin-backend/apps/vadmin/utils/authentication.py
index 3187058..2a61cb9 100644
--- a/dvadmin-backend/apps/vadmin/utils/authentication.py
+++ b/dvadmin-backend/apps/vadmin/utils/authentication.py
@@ -7,7 +7,7 @@ import jwt
 from django.conf import settings
 from django.contrib.auth import get_user_model
 from django.core.cache import cache
-from django.utils.six import text_type
+# from django.utils.six import text_type
 from django.utils.translation import ugettext as _
 from rest_framework import exceptions
 from rest_framework_jwt.utils import jwt_decode_handler
@@ -61,7 +61,7 @@ class OpAuthJwtAuthentication(object):
         :return:
         """
         auth = request.META.get('HTTP_AUTHORIZATION', b'')
-        if isinstance(auth, text_type):
+        if isinstance(auth, str):
             auth = auth.encode(settings.JWT_AUTH.get('HTTP_HEADER_ENCODING', 'iso-8859-1'))
         if not auth:
             return ''
diff --git a/dvadmin-backend/requirements.txt b/dvadmin-backend/requirements.txt
index 9b36e47..a45bce6 100644
Binary files a/dvadmin-backend/requirements.txt and b/dvadmin-backend/requirements.txt differ